Pneumatic motor.



T. DANQUARD. PNEUMATIC MOTOR.

APPLICATION FILED JULY 14, 1906.

95?,751. Patented May 10,1910.

M @Miva:

ls amaze a nro THOMAS DANQUARD, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO AUTO PNEUMATIC ACTION 00., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

PNEUMATIC MOTOR.

Specification of Letters Patent.

Patented May 10, 1910.

Application filed July 14,1906. Serial No. 326,163.

To all whom it may concern:

Be it known that I, THOMAS DANQUARD, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a new and useful Pneumatic Motor, of which the following is a specification.

My invention relates to pneumatic motors and is especially adapted for use in that class thereof which is ordinarily employed to propel the music sheet in ordinary mechanical pianos or playing attachments therefor and to operate other parts of the same.

The principal objects of the invention are to provide simple, efiicient and durable means for governing the speed of the motor and music sheet at the will of the performer so as to secure any desired speed and to secure these results with the location of the several parts in a convenient position with respect to each other so that the entire structure shall be compact. For these purposes the motor is located between the bellows and the governor, and the latter is connected with a passage to the tempo and re-roll valves.

Further features and advantages of the invention will appear below.

. Reference is to be had to the accompanying drawing in which,

F igure l is an elevation partly in section of a structure embodying the principles of my invention. Fig. 2 is a sectional view on a line 22 thereof. Fig. 3 is a sectional View on the line 3-3. Fig. 4 is a sectional view on the line 44, and Fig. 5 is a plan of the re-roll and tempo valves.

In the usual, or any desired way, the bellows is connected through a chest 10 and passage 11 with the main wind passage 12 in the body 13 of the motor. The latter passage communicates with a plurality of passages 14 which in turn, communicate with a corresponding series of motor pneum'atics 15. The communication between the passages 12 and 14 is controlled in each case by a slide or other valve 16. The operation of this valve is in eaoh case controlled by the operation of the corresponding motor pneumatic and the connections between them are in the present instance, illustrated as comprising a link 17 connected to the shaft 18 and a link 19 from thetshaft to the valve, the shaft beingprovided with two off-sets 20 and 21 of difierent radius from the center of the shaft, the off-set 20 connected with the link 17 being the greater. In the present instance, three of these pneumatics and valves are shown and in addition to the two passages 12 and 14 which each valve is ordinarily designed to control, a third opening 22 is provided adjacent to the passage 14. This passage communicates with a passage 23 which leads to the open air through the re-roll valve 24 and the tempo valve '25. These two valves may be operated in the usual or desired manner as for example, by means of levers 26 and 27, respectively. Communicating also with the passage 23 through a restricted opening 28, is a governor pneumatic 29. This pneumatic is provided with a spring 30 if desired, and it operates a rod 31 connected through a passage in the motor casing with the valve 32 which controls the passage 11 and governs the speed of the instrument. The governor pneumatic being in constant communication with the passage 23 is controlled by the tension therein and consequently when the motor is operating too fast, the valve 32 will be moved inwardly so as partially to close the passage 11 and restrict the flow of air through the motor, thus retarding the mo-- tion thereof.

The passage which the re-roll valve covers has a greater area than the passage 11 and consequently when a high speed is desired as for re-rolling the music sheet, this valve is opened and then the position of the valve 32 is immaterial because sufficient air can flow through the passage from the reroll valve to permit the motor to operate at a high speed.

In operation, the tempo valve is first opened in the usual way to permit the passage of air to the motor and as the three valves 16 are set at different angles'bn the shaft 18, there will at all times be a communication between the passage 23 and the passage 14 through at least, one of the valves which will enable the motor to be started. Some one of the valves also always permits flow of air between the passages 12 and 14 in the usual manner. a

The way in which the flow of air is controlled by the governor valve 32 has been described. It has been found in practice that the restriction of the orifice 28 improves even and steady the size of this the working and gives an motion to the motor, but

.orifice is of course re ttted by the size of the governor pneumatic ltSiM observed that these actions are see a construction in which tie motor pneumatic 1S located in convenient place w the scope of the inparti I to eznb o cly increto the exact J 31; e1, but

' and desire to secure by Letters-rate t i':

1. In music playing device, the combination of acasing having a main wind passage, a series of passages for communication with motor pneumatics, and a passage connected wi h the atmospheric air, with a series of valves, each covering one of the passages for communication with a motor pneumatic and a passage connected with the atmospheric air, whereby said valves can co nect either the main wind passage or the passage to the atmospheric air with the corresponding motor pneumatic.

2. in a music playing device, the combination of a motor havin a main wind passe. a series of pa for communication with motor pneu d passage connected with the z ospheiic air, wit a series of valves, each located outside the motor and in the -ir, and each covering one of the passages ccn'mnmication with a motor Pile-1111 d passage connected with th atmospheric air, whereby said valves can connect either the main wind passage or the passage to the atmospheric air with the corresponding motor pneumatic.

3, In music playing device, the combination of a main casing having a main wind passage, a motor pneumatic arranged outside the casing, said casing having a passage communicating with the motor pneumatic, a passage communicating with the atmospheric air, and a passage communicating with the main wind passage, said three passages opening on the outside of the ma n motor casing, and a valve controlled by the motor pneumatic adapted to cover the ends of said three passages.

In music playing device, the combination of a motor pneumatic, a casing having a main wind passage, a passage communicating with the motor pneumatic, a passage con municating with the atmospheric air, and a passage communicating with the main wind passage, and a valve controlled by the motor pneun:a;-c adapted to cover the ends of said three passage In a music playing device, the combination of a casing having a in in wind passage, series or passages for co; municatcon with motor pneuinatics, and passage in the 2 ie atwalls of the casing connected wi: niospheric air, said series of passage located betweenthe ot i i s vali oh i es 0: passa es :or c inlcanon tics, passage connected iic said series of pas l between e other two 2a. s h 1 gassa each communicatln with tne move: pneumatic with a series of valves each adapted to be moved into two positions in each of which it permits communication between one of said series of passages and one of the other two passages throu h the motor casing, a tempo valve and a re-roll valve for controlling the to said csp eric air passage, the inlet controlled by he "re-roll valve being of greater area than the smallest part of the main wind passage or" the motor, and a governor pneumatic connected with the atmospheric air passage of the motor casing by a restricted orifice, said governor pneumatic having means for controlling the effective of the main wind passage when the reroll valve is closed, whereby the air enat the tempo or reroll valve, passes along 3 atmospheric air passage, opera res 11G governor pneumatic, and expands he motor pneumatics, and is then drawn therefrom into the main wind passage.

8. In a music playing device, the combination ot a motor casing iavmg a main wmd passage, and a passage to the atmospheric air, a series of motor pneumatics, a crank shat;- having two sets of otlsets or diiterent 1. P 1 2 lengths :rom the axis of the shaft, each or t h t *1 th b' the OuSGLS aun a giea e1 eng emg connected with one of the motor pneumatlcs, a link connected with each of the other offsets, a valve connected to each of the links, said motor casing having sets of passages, constituting respectively a passage to the main wind passage, a passage to the atmospheric air passage, and a passage to a motor pneumatic between the other passages, all of said passages being adapted to be covered by said valves.

9. In a music playing device, the combination of a motor casing having through one wall thereof a main wind passage, a passage to the atmospheric air, and a series of passages located between the main wind passage and the atmospheric air passage, each communicating with a motor pneumatic, with a series of valves each adapted to be moved into two positions in each of which it permits communication between one of said series of passages and one of the other two passages through the motor casing, a tempo valve for controlling the inlet to said atmospheric air passage, and a governor pneumatic connected with the atmospheric air passage of the motor casing by a restricted orifice, said governor pneumatic having means for controlling the effective area of the main wind passage, whereby the air enters at the tempo valve, passes along the atmospheric air passage, operates the governor pneumatic, and expands the motor pneumatics, and is then drawn therefrom into the main wind passage.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

THOMAS DANQUARD. [L.S.]

WVitnesses:

CHAS. KoHLER, WM. J. KEELEY. 

